Mechanical Engineering - Contractor

Mechanical Engineer
The Pace: We're building at a speed most companies talk about but never actually operate at. You'll see your fingerprints on what we ship.
As a Mechanical Engineer at Giga, you will own HVAC and mechanical system design for AI data center infrastructure from early concept through construction documents. That means load calculations, equipment selections, hydronic system modeling, ductwork and piping sizing — the full scope. We work in person because the best engineering happens when smart people are in the same room.
Lead detailed HVAC mechanical design for mission-critical data center facilities, from schematic design through construction documents
Perform load calculations, psychrometric analysis, ductwork sizing, piping sizing, and equipment selections
Model and analyze hydronic systems using PipeFlo or equivalent software
Develop system models and energy analyses using Trane Trace, Carrier HAP, or similar tools
Produce design documentation in AutoCAD and Revit MEP, maintaining coordination-ready models throughout design phases
Collaborate with other disciplines to integrate mechanical systems into the broader facility design
Interface with equipment vendors and contractors to validate selections and support procurement
Bachelor's degree in Mechanical Engineering

• 3–5 years of professional HVAC design experience
• Proficiency in AutoCAD and Revit MEP for system design and modeling
• Proficiency in Trane Trace, Carrier HAP, or similar load calculation software
• Proficiency in PipeFlo or similar hydronic system modeling software
• Demonstrated competence in load calculations, psychrometrics, piping and ductwork sizing, and equipment selection

Bonus Points

Knowledge of mechanical cooling topologies used in data centers: CRAC/CRAH units, chilled water plants, air-cooled chillers, water-side and air-side economization, and evaporative/adiabatic cooling
Familiarity with high-density and liquid cooling approaches (direct liquid cooling, rear-door heat exchangers, immersion cooling)
Experience with hydronic system design including primary/secondary loops, variable flow systems, and plant sequencing
Experience reviewing or performing CFD analysis for airflow and thermal modeling
Understanding of how mechanical systems integrate with electrical infrastructure (UPS, generators, switchgear)
Commissioning experience — FAT, SAT, or functional performance testing
Experience authoring design narratives and basis-of-design documents and presenting them to clients or stakeholders
Subsidized health, dental, and vision insurance

• Equity (options) in a rapidly growing startup
• Healthcare and Dependent Care Flexible Spending Accounts (FSA) or Health Savings Account (HSA)
• Pay Transparency The range provided below is the role's On Target Earnings ("OTE") range, meaning it includes both the commission / bonus target and annual base salary for the role (if applicable). Additional benefits include 401(k) plan plus subsidized medical, dental, and vision benefits.

Giga Energy is an equal opportunity employer and is committed to fostering an inclusive and diverse workplace. We do not discriminate based on race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other protected characteristic as outlined by federal, state, or local laws. Giga Energy complies with all applicable labor laws, including the California Fair Employment and Housing Act (FEHA) and other relevant state and federal regulations. We provide reasonable accommodations for qualified individuals with disabilities and encourage applicants who require accommodations during the hiring process to contact us.